First Row Answer: 240 ÷ 3 = 80.

X=80

Second Row Answer: 80 + 80 = 160
260 - 160 = 100

Y=100

Third Row Answer: -800 + -100 = -900
-900 ÷ 2 = -450

Z=-450

So... X + Y + Z is 80 + 100 + -450 = -270

The answer is -270.

QuietViewer said:

First Row Answer: 240 ÷ 3 = 80.

X=80

Second Row Answer: 80 + 80 = 160
260 - 160 = 100

Y=100

Third Row Answer: -800 + -100 = -900
-900 ÷ 2 = -450

Z=-450

So... X + Y + Z is 80 + 100 + -450 = -270

The answer is -270.

Correct me if I am wrong.

QuietViewer said:

Correct me if I am wrong.

X + Y + Z = 630

Z = 450, not -450. You forgot to include the - when dividing by 2.

blindVigil said:

X + Y + Z = 630

Z = 450, not -450. You forgot to include the - when dividing by 2.

If Z is 450 then the third row would be 100 + (450 x 2) = 1000 instead of... 100 + (-450 x 2) = -800

That would make X + Y + Z Be 80 + 100 + 450 = 630. (your answer)

I have no idea where you have gotten the idea that Z is a positive number when the 3rd row's answer is a negative.

QuietViewer said:

If Z is 450 then the third row would be 100 + (450 x 2) = 1000 instead of... 100 + (-450 x 2) = -800

That would make X + Y + Z Be 80 + 100 + 450 = 630. (your answer)

I have no idea where you have gotten the idea that Z is a positive number when the 3rd row's answer is a negative.

It's MINUS Z.
If Z was negative the third row would need to be Y+2Z.

QuietViewer said:

If Z is 450 then the third row would be 100 + (450 x 2) = 1000 instead of... 100 + (-450 x 2) = -800

That would make X + Y + Z Be 80 + 100 + 450 = 630. (your answer)

I have no idea where you have gotten the idea that Z is a positive number when the 3rd row's answer is a negative.

The third equation's answer is negative because that's what happens when you subtract a bigger number from a smaller number.

It's Y - 2Z = -800, not Y + 2Z = -800.